Real quick Vanguard-Harbinger question

[Smitty]

I noticed that at the end of the book (kindle version) there is a cast of characters and some description of them. Is this something I can refer to while reading the book without spoiling anything?
Love the book by the way, at the start of Chapter 8 currently.

 

[captcalhoun]

i think it may have a few minor spoilers.

 

[Smitty]

I am glad I asked, thanks! I did find the author's annotations, that is really cool!

 

[MatthiasRussell]

The diagrams give nothing away.